During the holidays like Thanksgiving, you might wonder what the point is of preheating your oven. Or maybe you are trying to save time and want to just put in your casserole as soon as you turn on the oven. Don't do this. we will explain why. Time and temperature can actually affect the texture and flavor of your food, especially when baking. The quality of your food will be better if you do preheat your oven the whole time. If you don't, some foods just don't turn out right